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</div>
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<main id=body-inner>
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<h1>Discovery Event</h1>
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<p>by waldo</p>
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<p><em>by waldo</em></p>
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<h1 id=abstract>Abstract</h1>
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<p>The “Discovery Event” pattern is a way for a generic functionality, to call out to other functionalities that want to make use of it, by raising an event, so that they have an event to subscribe to. This is usually done to set itself up within the generic app.</p>
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<h1 id=the-problem>The problem</h1>
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<p>When you publish an event, it should obviously be raised somewhere in the code as well. In the below example, I want to raise the event simply by a method which I want to call from a page. So I create a global function where I raise the event:</p>
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<p><a href=Pic2b.jpg><img src=Pic2b.jpg alt=" "></a></p>
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<h2 id=step-3-create-one-or-more-global-functions-so-that-your-subscriber-can-call-into-your-functionality-to-configure-set-up-or-do-whatever-it-needs-to-do-to-make-itself-discoverable>Step 3: Create one or more global functions, so that your subscriber can call into your functionality to configure, set up, or do whatever it needs to do to make itself discoverable</h2>
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<p>The generic functionality that I want to call, should be part of the main class - in this case the<strong>Module Discovery</strong> class, or better, the table (<strong>Module Status</strong>). In this table, I create this global function, because I want to make it available for the subscribers:</p>
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<p>The generic functionality that I want to call, should be part of the main class - in this case the <strong>Module Discovery</strong> class, or better, the table (<strong>Module Status</strong>). In this table, I create this global function, because I want to make it available for the subscribers:</p>
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<p><a href=Pic3.jpg><img src=Pic3.jpg alt=" "></a><br>
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The business logic doesn’t really matter for this pattern. This is obviously dependent on the functionality where you would like to implement the pattern.</p>
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<h2 id=step-4-subscribe-from-the-places-in-the-app-to-this-event-use-the-global-functions>Step 4: subscribe from the places in the app to this event, use the global function(s)</h2>
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